Yes, I agree, it is not an antenna gain problem... it is better to find a way to draw the constellation like LH for the TBolt. This way you can find out if the antenna is free or not from obstructions.
On Tue, Jul 17, 2012 at 5:25 PM, Bob Camp <[email protected]> wrote: > Hi > > The antenna gain is likely *plenty* for that short a run of coax. > > Bob > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Chris Hoffman, KG6O > Sent: Tuesday, July 17, 2012 11:16 AM > To: [email protected] > Subject: Re: [time-nuts] time-nuts Digest, Vol 96, Issue 70 > > Wow! Great info. > > The 5v mag mount antennae are working, but the receivers are cycling > between > 2-D and 3-D (5 or 6-bird) modes. With the 26dB trimbles, I suspect I'm > loosing ~5db in the 30ft of crumby RG-5, and a little pattern with my > rain-gutter backplane. > > I don't have too much arial obstruction, but that's no excuse from > overkill: > I'll be on the lookout for 26- or 40[?!?]-dB cones. > > Does anyone have a Lucent part number available? > > -CH > > On Jul 17, 2012, at 5:00, [email protected] wrote: > > > Send time-nuts mailing list submissions to > > [email protected] > > > > To subscribe or unsubscribe via the World Wide Web, visit > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > or, via email, send a message with subject or body 'help' to > > [email protected] > > > > You can reach the person managing the list at > > [email protected] > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of time-nuts digest..." > > > > > > Today's Topics: > > > > 1. Re: XL-DC Antenna Requirements (Tom Knox) > > 2. Re: XL-DC Antenna Requirements (Bob Martin) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Mon, 16 Jul 2012 18:11:59 -0600 > > From: Tom Knox <[email protected]> > > To: Time-Nuts <[email protected]> > > Subject: Re: [time-nuts] XL-DC Antenna Requirements > > Message-ID: <[email protected]> > > Content-Type: text/plain; charset="iso-8859-1" > > > > > > Hi Chris; > > There were a number of XL-DC produced with 12vdc antenna power and should > be marked near the connector. There are also some marked "Down converter > required". Other then then those the 58532A is a great choice andf sold > under a number of names such as VIC-100, the Lucent antennas are also nice. > The lucent are available in three gains 20, 26, 40 dB version. Most are the > 26dB version and are a great product. Placement can be important, and > although you could use indoors it will perform best as low as possible with > a full view of the sky. (Low to avoid terrestrial interference). > > > > Thomas Knox > > > > > > > >> Date: Tue, 17 Jul 2012 00:50:02 +0200 > >> From: [email protected] > >> To: [email protected] > >> Subject: Re: [time-nuts] XL-DC Antenna Requirements > >> > >> The XL-DC is a 6 channels receiver, so no other benefit other than a > >> greater probability to see constantly 6 satellites is gained from 24 to > 32 > >> satellites constellation. > >> > >> On Mon, Jul 16, 2012 at 11:59 PM, Chris Hoffman <[email protected]> > wrote: > >> > >>> All, > >>> > >>> Though somewhat outmoded, looking forward to starting my own time shop > >>> with two XL-DC controllers that I have been lucky enough to pick up > >>> recently. > >>> > >>> My question: Do I really need to invest in the likes of the HP 58532A > >>> antennae, or will my surplus Trimble magnetic antennae -- magnetically > >>> attached to a random ferrous backplane -- do? > >>> > >>> I guess what I am really asking: what are the relevant antenna design > >>> requirements here, and does the advent of as 32-satellite-constellation > >>> have any effect upon the antenna choice (i.e. design downgrade) for the > >>> TrueTime XL-DC? > >>> > >>> -CH > >>> > >>> Chris Hoffman > >>> [email protected] > >>> http://ar.ctur.us > >>> > >>> > >>> > >>> > >>> > >>> > >>> -CH > >>> > >>> Chris Hoffman > >>> [email protected] > >>> http://ar.ctur.us > >>> > >>> > >>> > >>> > >>> _______________________________________________ > >>> time-nuts mailing list -- [email protected] > >>> To unsubscribe, go to > >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >>> and follow the instructions there. > >>> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > > > > > > ------------------------------ > > > > Message: 2 > > Date: Mon, 16 Jul 2012 18:02:49 -0700 > > From: Bob Martin <[email protected]> > > To: [email protected] > > Subject: Re: [time-nuts] XL-DC Antenna Requirements > > Message-ID: <[email protected]> > > Content-Type: text/plain; charset=us-ascii > > > > Chris-- > > > > The 58532A is somewhat higher gain (30dBi or better) than most mag-mount > antennas (26dBi typ IIRC). The pointy nature of the 58532A also serves as > an avian deterrent, reducing the accumulation of attenuating deposits... > > > > Running two receivers, I would highly recommend a real GPS distribution > amp such as the 58535A. Such a beast will let you run both receivers from > one antenna, while providing isolation between the receivers. I just > happen > to have one handy, having recently pulled it out of service and replaced it > with a 4-port model to better support my time-nuttiness. Contact me off > list if you would be interested. > > > > 73 Bob [email protected] > > > > > > On Jul 16, 2012, at 16:01, [email protected] wrote: > > > >> Message: 1 > >> Date: Mon, 16 Jul 2012 14:59:52 -0700 > >> From: Chris Hoffman <[email protected]> > >> To: [email protected] > >> Subject: [time-nuts] XL-DC Antenna Requirements > >> Message-ID: <[email protected]> > >> Content-Type: text/plain; charset=us-ascii > >> > >> All, > >> > >> Though somewhat outmoded, looking forward to starting my own time shop > with two XL-DC controllers that I have been lucky enough to pick up > recently. > >> > >> My question: Do I really need to invest in the likes of the HP 58532A > antennae, or will my surplus Trimble magnetic antennae -- magnetically > attached to a random ferrous backplane -- do? > >> > >> I guess what I am really asking: what are the relevant antenna design > requirements here, and does the advent of as 32-satellite-constellation > have > any effect upon the antenna choice (i.e. design downgrade) for the TrueTime > XL-DC? > >> > >> -CH > >> > >> Chris Hoffman > >> [email protected] > >> http://ar.ctur.us > > > > > > > > ------------------------------ > > > > _______________________________________________ > > time-nuts mailing list > > [email protected] > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > End of time-nuts Digest, Vol 96, Issue 70 > > ***************************************** > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
